ElementTextField.java

package lux.index.field;

import java.io.IOException;
import java.util.Collections;

import lux.index.FieldRole;
import lux.index.XmlIndexer;
import lux.index.analysis.DefaultAnalyzer;
import lux.index.analysis.ElementTokenStream;
import lux.index.analysis.XmlTokenStreamBase;
import lux.xml.SaxonDocBuilder;
import net.sf.saxon.s9api.XdmNode;

import org.apache.commons.io.input.CharSequenceReader;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.document.Field.Store;
import org.apache.lucene.document.TextField;
import org.apache.lucene.index.IndexableField;

/**
 * Indexes the text in each element of a document
 */
public class ElementTextField extends FieldDefinition {
    
    public ElementTextField () {
        super (FieldRole.ELEMENT_TEXT, new DefaultAnalyzer(), Store.NO, Type.TOKENS);
    }
    
    @Override
    public Iterable<IndexableField> getFieldValues(XmlIndexer indexer) {
        XdmNode doc = indexer.getXdmNode();
        if (doc != null && doc.getUnderlyingNode() != null) {
            SaxonDocBuilder builder = indexer.getSaxonDocBuilder();
            Analyzer analyzer = getAnalyzer();
            TokenStream textTokens=null;
            try {
                textTokens = analyzer.tokenStream(getName(), new CharSequenceReader(""));
            } catch (IOException e) { }
 
            XmlTokenStreamBase tokens = new ElementTokenStream (getName(), analyzer, textTokens, doc, builder.getOffsets(), indexer.getProcessor());
            tokens.configureElementVisibility(indexer);
            return new FieldValues (this, Collections.singleton(new TextField(getName(), tokens)));
        }
        return Collections.emptySet();
    }
}

/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
 * You can obtain one at http://mozilla.org/MPL/2.0/. */